Belgian national TT champion and all-round phenom Wout van Aert starts.

He's won two bunch sprint in this year's Tour and has dropped GC contenders by setting infernal tempos on climbs for team-mate Primoz Roglic.

Van Aert certainly has the ability to win today - and tomorrow, ridiculously.

Thibaut Pinot is riding well. He's only about a minute down on Remi Cavagna at the first time check.

The Frenchman won't be contesting the stage win but may well be looking to set one of the fastest times up La Planche des Belles Filles.

Time trial within a time trial today.

There are king of the mountains points on offer for the fastest six riders up La Planche des Belles Filles.

David de la Cruz set the early mark but Omar Fraile has just beaten his time by three seconds.

Fraile did it in 17mins 37secs.

That's what Richard Carapaz, Tadej Pogacar and Primoz Roglic have to target in the polka dot jersey competition.

15:56 - Alejandro Valverde (Spa/Movistar)

15:58 - Tom Dumoulin (Ned/Jumbo-Visma)

16:00 - Rigoberto Uran (Col/EF Pro Cycling)

16:02 - Adam Yates (GB/Mitchelton-Scott)

16:04 - Enric Mas (Spa/Movistar)

16:06 - Mikel Landa (Spa/Bahrain McLaren)

16:08 - Richie Porte (Aus/Trek-Segafredo)

16:10 - Miguel Angel Lopez (Col/Astana)

16:12 - Tadej Pogacar - (Slo/UAE Team Emirates)

16:14 - Primoz Roglic (Slo/Jumbo-Visma)

We are just under half an hour away from the top 10 on GC starting to tackle this TT.

1. Remi Cavagna (Fra/Deceuninck-Quick-Step) 57mins 54secs

2. David de la Cruz (Spa/UAE Team Emirates) +41secs

3. Soren Kragh Andersen (Den/Team Sunweb) +2mins

4. Max Schachmann (Ger/Bora-Hansgrohe) Same time

5. Alessandro de Marchi (Ita/CCC Team) +2mins 07secs

6. Kasper Asgreen (Den/Deceuninck-Quick-Step) +2mins 31secs

7. Nelson Oliveira (Por/Movistar) +2mins 43secs

8. Nils Politt (Ger/Israel Start-up Nation) +3mins 05secs

9. Wout Poels (Ned/Bahrain McLaren) +3mins 15secs

10. Felix Grossschartner (Aut/Bora-Hansgrohe) +3mins 32secs

Soren Kragh Andersen's superb Tour de France continues - the Danish double stage winner has just finished in third overall, two minutes down on Remi Cavagna.

Thibaut Pinot, speaking before the start of stage 20: "Obviously, today’s stage being my home race has played its part in my decision to continue the Tour de France despite my injuries. It’s the ice on the cake. There is a big crowd today. I will give 100% even though my condition is not at 100%."

Thibaut Pinot sets off.

It's been a miserable Tour for the French favourite, who came in aiming to win it but dropped out of GC contention very early on, suffering with a back injury.

He came so close last year - sitting fifth overall after stage 18, just 20 seconds behind eventual winner Egan Bernal. But a muscular injury caused by hitting his leg against his handlebar forced him out of the race in tears the following day.

Why hasn't he abandoned this Tour by now? Well this stage goes close to where he lives and he couldn't bring himself to be sat at home while the Tour went past without him.

How can you not love Thibaut Pinot?

1. Remi Cavagna (Fra/Deceuninck-Quick-Step) 57mins 54secs

2. David de la Cruz (Spa/UAE Team Emirates) +41secs

3. Alessandro de Marchi (Ita/CCC Team) +2mins 07secs

4. Kasper Asgreen (Den/Deceuninck-Quick-Step) +2mins 31secs

5. Nils Politt (Ger/Israel Start-up Nation) +3mins 05secs

6. Wout Poels (Ned/Bahrain McLaren) +3mins 15secs

7. Felix Grossschartner (Aut/Bora-Hansgrohe) +3mins 32secs

8. Connor Swift (GB/Arkea-Samsic) +3mins 53secs

9. Maxime Chevalier (Fra/B&B Hotels-Vital Concept) +4mins 03secs

10. Ben Hermans (Bel/Israel Start-up Nation) +4mins 15secs

France's Julian Alaphilippe rolls down the start ramp to rapturous applause.

Remember his time trial win in Pau last year? It was astonishing.

And it was the moment where everyone started to think, 'Hang on, he might just go all the way here.'

He couldn't hold on, of course. But that TT win really ignited a special race.

What can he do today?

Admirable words from Caleb Ewan and he's backed it up - Lotto Soudal have not had a single fine for drafting or riders holding on to their team car for too long.

Ewan has often been the first rider dropped on the big mountain stages but has made it through each time.

He'll be inside the time cut today too and has the chance for a second straight win on the Champs-Elysees tomorrow.

More from Caleb Ewan on ITV4: "I had to go super hard in the first bit because I was so worried about making the time cut.

"I feel I've been getting as the Tour has gone on but I can't really remember how tired I was at this point last year.

"I knew I would be dropped at many points in this year's Tour but I told my team I would never draft behind a car. If I'm not good enough to make Paris then I'm not good enough."

Aussie sprinter Caleb Ewan has just been speaking to ITV4...

When asked if he would like more time trials that end in a 5.9km climb: "No."

The question was asked in jest, of course.

Bob Jungels, who has been harder to spot this Tour having not won the Luxembourg road race title for once, is on the course.

He is Luxembourg TT champion though. Good to have a familiar sight back.

Ineos' Luke Rowe has just been explaining the bike change tactics to ITV4.

The idea is to wait for the right moment when the road kicks up and you're going your slowest on your TT bike before switching.

If you swap on a flat section, you lose more time decelerating to a standstill.

Watch out for Ineos to pull off a well-timed bike change for Richard Carapaz later.

Huge ride by David de la Cruz!

The Spainard comes in 41 seconds down on Remi Cavagna to move into second overall.

Interestingly he switched to his road bike, unlike Cavagna, and started the final climb 54 seconds down on the Frenchman's time.

So the UAE Team Emirates rider gained 13 seconds on the climb.

Thomas de Gendt is not going for this today. He's over a minute down on Remi Cavagna as the first time check.

1. Remi Cavagna (Fra/Deceuninck-Quick-Step) - 57mins 54secs

2. Alessandro de Marchi (Ita/CCC Team) +2mins 07secs

3. Kasper Asgreen (Den/Deceuninck-Quick-Step) +2mins 31secs

4. Nils Politt (Ger/Israel Start-up Nation) +3mins 05secs

5. Wout Poels (Ned/Bahrain McLaren) +3mins 15secs

6. Connor Swift (GB/Arkea-Samsic) +3mins 53secs

7. Maxime Chevalier (Fra/B&B Hotels-Vital Concept) +4mins 03secs

8. Chris Juul Jensen (Den/Mitchelton-Scott) +4mins 17secs

9. Christophe Laporte (Fra/Cofidis) Same time

10. Krists Neilands (Lat/Israel Start-up Nation) +4min 19secs

Sunweb's Marc Hirschi, winner of one stage and animator of plenty more, sets off.